Need Ideas/Help [Program Verification]

Alright, I have been brainstorming on how to do this for awhile, but still not have come up with a valid way.

I have a Program Verification EXE. It verifies that you are a member of my site and you can access/use the program. Now, here is what I want to do.

Tp the simplify the process for the programmer when adding the checks, I want it so that they only need to add either an OCX, or a module that will load the checks and verify. Here is my thing:

Note: The EXE will be downloaded and installed when the user becomes a member, the EXE should be located at the same directory at all times.

-How would I run the EXE and make the other program wait until it finishes
-How would I transfer data from program to program. Specifically transfering whether they were validated or not.
-How to give extra commands when a program is Shelled (Which is the way it will be activated).

Any ideas and help would be nice :) Thanks in advanced.

I would recommend putting the verification process into a class, then you can put the class into a DLL for other develepers to use.

They would simply reference the DLL, create an instance of your class, and call the validation function (which can have parameters).

This takes care of all 3 or your questions :)